I haven’t seen anyone respond to your thread yet, so I’ll do some research. I have some information, but I’ve never personally used it. I’ve read a lot of books and websites about it, and based on the descriptions, I think it might be something you can do. If there’s no bleeding and the bill isn’t severely cracked, you might not need to use super glue right away. The wrinkles could be from bruising or a minor injury, and if it’s not affecting her ability to eat or drink, it might heal on its own.
If you decide to use super glue, first clean the area with a mild antiseptic like diluted betadine. Apply a small amount of medical-grade super glue to seal the crack (if there is one), and place a wet piece of a tea bag on top to help with healing. Hold it gently for a few minutes to let it mold to the crack. Afterward, monitor her closely for any changes or signs of infection.
If the injury seems to worsen, or if she starts having trouble eating or drinking, it’s best to consult a vet.